QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

5 km NNW of Breckinridge, Oklahoma

· 8.0 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Garfield County 12 kmGrant County 34 kmNoble County 48 kmAlfalfa County 58 kmKingfisher County 61 kmKay County 66 kmLogan County 69 kmMajor County 73 kmPayne County 83 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.6 (ml)
Depth
8.0 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Garfield County, 12 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3019 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 36.4817, -97.7555. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Garfield County, OK 12 km (7 mi) NNE of here earthquakes near Garfield County
Grant County, OK 34 km (21 mi) S of here earthquakes near Grant County
Noble County, OK 48 km (30 mi) WNW of here earthquakes near Noble County
Alfalfa County, OK 58 km (36 mi) ESE of here earthquakes near Alfalfa County
Kingfisher County, OK 61 km (38 mi) NNE of here earthquakes near Kingfisher County
Kay County, OK 66 km (41 mi) SW of here earthquakes near Kay County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

57 earthquakes have been recorded within 50 km since this one.

  1. 2.6 10 km SSE of Marshall, Oklahoma
  2. 4.0 10 km SSE of Marshall, Oklahoma
  3. 2.5 10 km SSE of Marshall, Oklahoma
  4. 2.5 10 km SSE of Marshall, Oklahoma
  5. 3.0 10 km SSE of Marshall, Oklahoma
  6. 2.8 10 km SSE of Marshall, Oklahoma
  7. 3.7 10 km SSE of Marshall, Oklahoma
  8. 2.8 4 km NNW of Medford, Oklahoma
  9. 2.8 4 km W of Lucien, Oklahoma
  10. 2.8 8 km SSE of Pond Creek, Oklahoma
  11. 2.8 3 km SE of Meno, Oklahoma
  12. 2.6 5 km E of Hennessey, Oklahoma
  13. 3.0 5 km E of Hennessey, Oklahoma
  14. 1.6 5 km NNW of Breckinridge, Oklahoma
  15. 2.3 9 km W of Orlando, Oklahoma

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-09-08 — it released about 350 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.